• 1973 - 1984 Referee for Inorganic Chemistry,
  Alexander von Humboldt-Stiftung


• 1976 - 1980 Trustee of the Fonds der
  Chemischen Industrie in Frankfurt am Main


• 1982 - 1997 Trustee of the
  "Fonds der Chemischen Industrie" in Göttingen


• 1989 - 1995 Member of the Board of the
  "Engere Kuratorium des Fonds der Chemischen Industrie"


• 1975 President of the local section Frankfurt
  of the GDCh (German Chemical Society)


• 1982 - 1987 President of the branch
  "Chemical Education"of the GDCh


• 1988 - 1995 Member of the
  Executive Board of the GDCh


• 1986 - 1991 Member of the Scientific Board of the
  "Gesellschaft Deutscher Naturforscher und Ärzte"


• 1988 - 1990 President of the Section Chemistry
  of the "Gesellschaft Deutscher Naturforscher und Ärzte"


• 1987 - 1990 Member of the Scientific Board of
  Deutsches Museum in München


• 1989 - Present Member of the Scientific Board of
  "Chemisches Institut Dr. Flad" in Stuttgart


• 1987 - 1995 Member of the Scientific Board of
  "Chem Inform"


• 1990 - Present Member of the Board of the
  Josef Stefan Institute, Ljubljana


• 1991 - 1993 President of ADUC


• 1992 President of the European Selection
  Committee of the Alexander von Humboldt Foundation


• 1995 Vice President of the
  Gesellschaft Deutscher Chemiker


• 1996 President of the
  Wöhler-Vereinigung of Inorganic Chemistry


• 2002 President of the
  Akademie der Wissenschaften, Göttingen